962

Theory of the circulation of the waters.

This is meant to represent the earth cut through in the middle, showing the depths of the sea and of the earth; the waters start from the bottom of the seas, and ramifying through the earth they rise to the summits of the mountains, flowing back by the rivers and returning to the sea.

Taken from The Notebooks of Leonardo da Vinci edited by Jean Paul Richter, 1880.

Notebooks of Leonoardo da Vinci

XVI: Physical Geography.

. . .

The relative height of the surface of the sea to that of the land.

942,

943,

944,

Refutation of Pliny’s theory as to the saltness of the sea.

946,

The characteristics of sea water.

948,

On the formation of Gulfs.

950,

On the encroachments of the sea on the land and vice versa.

952,

953,

The ebb and flow of the tide.

955,

956,

957,

958,

959,

Theory of the circulation of the waters.

961,

Observations in support of the hypothesis.

963,

964,

965,

966,

967,

968,

On the way in which the sources of rivers are fed.

The tide in estuaries.

confluence.

972,

973,

Whirlpools.

On the alterations in the channels of rivers.

The origin of the sand in rivers.

977,

The formation of mountains.

979,

980,

981,

. . .